<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>


    <style>

        *{
            margin: 0;
            padding: 0;
        }

        html,body{
            height: 100%;
        }

        .left{
            width: 200px;
            background: red;
            height: 100%;
            float: left;
        }

        .right{
            width: calc(100% -200px);
            background: yellow;
            height: 100%;
        }

    </style>

</head>
<body>
    
    <!-- <div> 两栏布局方式1</div> -->

    <div class="left"></div>

    <div class="right"></div>


</body>
</html>